specifications - FAACO - Federal Aviation Administration Contract ...

FTWIC-2235June, 2009Fabricate miscellaneous fabricated steel components such as window shade pockets,coordinator jacks, hoist access openings, frame supports, ceiling panel supports and otherhangers or brackets indicated on the drawings or as required to complete the installation.M. FLOOR HATCH GUARDRAILS:2.04 STEEL FRAMES:Construct special guardrails to the details indicated on the drawings at floor hatches.Guardrails shall be all welded construction, designed to be pivoted and pinned, capable ofbeing lowered into the hatch opening when not in use.A. Frames shall not have less than two (2) structural members which span across adjacentpurlins. Openings shall be framed with steel angles of a size suitable for the openingsize. When wood curbs are detailed as part of the frame design, provide angles havingoutstanding legs turned upward, with holes punched for attaching wood curbs. Holesshall be spaced at 12" inch centers, with no side having less than three fasteners. Size offrames and opening dimensions shall be coordinated with equipment manufacturer.Minimum size of supporting angles shall be 3 1/2" x 5" x 3/8".B. Frames used to support roof top air conditioning equipment shall have additionalmembers to frame each duct penetration of the roof surface. As well as a structuralmember corresponding to the mounting curb perimeter dimensions of the mechanicalequipment.C. Frames for roof drains and any other roof penetration not exceeding 24 inches squareshall be a minimum size of 2 1/2" x 2 1/2" x 5/16". All other frames shall be as detailedon drawings.2.05 CAST IRON CASTINGS:Casting shall be uniform in quality, free from blow holes or other defects. Surface shall besmooth and true to pattern. Metal shall conform to ASTM A-48, Class 40 for grey cast ironcastings. Castings shall receive one coat of rust inhibited primer and shall be field painted asspecified in Section 09901, PAINTING. Casting shall include the following:A. Manhole Covers and FramesB. Trench Drains2.06 BRONZE CASTINGS:Castings shall be uniform in quality, free from injurious defects with smooth surfaces and true topattern. Casting metal shall be CDA Alloy 844. Casting shall include the following:Downspout nozzle: Josam 25010 Series or approved equal, satin-finish bronze nozzle with looseall flange and inlet threaded connection, size as required.05500-8